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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '845c1f17fc6002afbceb4c83cac47b563a1fdb3ce8990e10cd420d21191fdc34' 
  AND token = 'YAWljWDV63J6d0YOB0dZ0estWCHTAKXzmV7W9/5Ih2I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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