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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e9f8db624b02008267c207c977db0395696013283e63696faf41a95a18aafce2' 
  AND token = '+HISoHBmflSNa0yqNGpbAibTVGnSQEivL75y98j8O+I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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