SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c1d8e8b869b3f2784915922e992fa29ce41ae78f0ad6618c583eb22cfd986715' 
  AND token = 'uiK19oDYt2390jHk6Qk5FatbiQwWYb3jZZQ8Tjh+2GI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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