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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5cee2eaa2ff47062bce535ac7935da73bb85032c04bd4744b31a326ba345a4a4' 
  AND token = 'vKcB3KTRAtra4lhtM9e/cwl3PwD6Q3v9R2zIYGHf3HA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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