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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e25d29df5dcd1e9e5c492b218c57f45d76433a682a40aff741fb86d4204e83c4' 
  AND token = 'p+4yIJor4nx7kYbVE/NPeUTHrGOj7x4y/xQ4DXacVF0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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