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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4578e0d45d708ebba3fa83730a2f5589370fd4e1d781bbdd357f01de4bb0de26' 
  AND token = 'PzBkdoT2oc67nJfXB7fqnhzJQOLbR+niQVW6FvwCo3E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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