Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c61ec1c70d3b2dfcf9ac0e1dc18c4ea13b48614300bc2a8861206616a3c54c56' 
  AND token = 'lr65b8lAPAkd/UNwJ9gnlvtImv6R86EFX0My4vREI28=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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