Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c05ed1d52b58c6cbe7eb2969e834dde584b8965f6c7b29b201f933407d02e83c' 
  AND token = '6+PSHRfGlkBOSgLWCNnXkB6kgzwJ4znyM86OYPk/G9A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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