Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd750cea36999a1d203aa3e0ff75e569b41827432a6fcf620a2cb0550dca5b333' 
  AND token = 'AKSU9KWzUzj8D+Qj06S5oTweJv8JoF7LOy3FDO3NQdg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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