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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '69522124becb30e64d6ab4fa18b42d15a22c4d18d9d63cbcedbe6e9fb2052b01' 
  AND token = 'bDZoPBTfEjIY4ONRqCXOChtC4yS9xjEwEQ4FQTwUvvE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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