Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '04fd86bd07b32d92034f2cf2f00e3b0c83323b17c14c17de0f764816b7616d0c' 
  AND token = 'bDfhO+6ljEo1DQliLk7UekERx9KogLo+90z9YHsU0fA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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