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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0ed2027e1138c77a2b55fca33b742ec9638cd9f624d10078e56ae7c95f0b55ed' 
  AND token = 'wAX3jio5tmxYvjY5DHYUaj7dsC35XMmqIvckmyTNAAU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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