Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '37f1d8da593513bbe9393d6ddc0b6a3a7f304bd92fbbfcdafad9920c206b50da' 
  AND token = '6k/Ci14xPSpt4TlgmPc+85R7dU8dDhIf7SU4nr+PAfs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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