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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '578cd0b730afd375917d51de0c999ff7ff1ead2cb1475e25736bb471f2fd7ed8' 
  AND token = '0f14/3Ms4Pl7jcZxJ5ijbJ/FPYlF7SfMlYchdk8usyc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}