Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5c486eab5cc2c2c2c723c03f5c37f10070098820f0243f0b26c37dd85b84d45d' 
  AND token = '2fEMGAz0X+X19dyfnmAOZvkYQGXqgIOERXm8biMneM8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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