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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ecad1d2107c9a896e489500f45a315614422610e59d0f90666557cc90a9de5d2' 
  AND token = '1yNE/UWs3VDtn0Fn9gcg9ybq3N3jxa+cykJQMIltrLc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}