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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '108fd07ce0d6aec5c60dad17b88d92b9655dbd551e7d3736ebf95f593a108575' 
  AND token = '3e2qgnQ7pGsVuc83/zDX0IIKW3y7sgjYo5hy8W52nHE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

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