SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '593a0cfc467f4804719d776f56fc83e605f322b6ca32707452b01fe7b89431e2' 
  AND token = 'RBAAW/mUzCWgXFyY9oFBBPKUjfYcZXSGRNmYDBcJQPg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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