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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '60895a28da22218b4a4a6a533c010abd1ce9c3dd0d4a71641ef989d57d9694e7' 
  AND token = 'a6wdt96V1Nf5A3a3hWX8KgYXCjQPvy8ijdKNdOEDVwY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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