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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '58185a3213993a01e9f3e480a490f9c02d2c3d88c963f46f44454e47189d39ef' 
  AND token = 'B4go/Q+tX4u6NtGtp43xf4oFdDLFukxSevdbfdgEXQI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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