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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '06df4cd0df5594a39f09981d347a6e6e6e1272ec0e6dc489c0869fefc154a1e6' 
  AND token = 'U+D/DIxbGfogeefw6cyZX9mGxznpruEbUKS1aUU+BKo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

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