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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '05c48069180735178ba8ca784626d7ff5045c6bf8287faa7f063015e628b4a4a' 
  AND token = 'WPN7UteWMtgaNV21HwmqOo0PmrE8yX5kAf2zGzx8L8o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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