Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '53de934d3a956555910525fad5bcd1673de6a94771e14032a8532a307c619c46' 
  AND token = 'SxMzPIJ41s40S/pQxn8DTPNGkqig4u2f+BrVwH9z0AE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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