Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7f4f092e8a247cb2e343cc5deb4011185be44e49cdca2d27ec263f30c11fae62' 
  AND token = 'Aw/u1p4hyNke4Bh38wJwNhTfUrPekpNq4Mf3vbxEbI4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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