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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '32ff86c0fbc10c3b87f4521b4dae17faaa9763eed8e8358f976b6cd8088025e3' 
  AND token = 'rYWe2E4KRwHY/nWw7Pt/yo4B19ouakwZ6PH3On/X6GY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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