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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '74dc0570a234bbfb766ce7706fa57439b1834f9f87a51b4209c672249f101bf6' 
  AND token = 'PgsGsUwOTIoVKnWNPlOH5Yq1V5O7CPP6tEt8bh5l0sA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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