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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5554ae8b8a8fc6530d98f87c2ba4a737d42b56d3550cbdb3ba9cfbfb5113de6b' 
  AND token = 'Pq8VYUL5PWq1HcRCCIzA5k8zDN/jJZemmD0t3WeZ+oo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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