Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'c080b4171ef2ee9a28bbf1c6080f95be8dd35fdaf9ca6065295c02582deb0362' 
  AND token = 'N1I6ZZ4loB0EEcrkx6e8wsLigG8d5XJoaqvQaTRwqPU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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