Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e453df5767f07f6850a17ccea51d8140e7b0ff073f8c28d13e8dc6b294071301' 
  AND token = 'zOO7WGeIreW1Xhb1IuCPCG+04dZO/Es6+ZD10DaHYp0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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