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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '22b818b7254d42357d2ce620a773edd9b34ba77b24ba882445c900f70ef985ba' 
  AND token = 'WvDqoZRgpOwcOH4YUOj9jWHoPRBAFUHlT3YxbQrymT4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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