Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ce9c8bb8061a64b16b4059233144036f06e887e35196d19346022b3d1cdd6071' 
  AND token = 'bZ6AaX7bTYBwdBbfT2txzFik1bAMfBPFBsLVmfQD7DA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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