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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fdba1269d822f4e9bc6034307bb28b39fe392f538d91d2ff6816fe9f459d5332' 
  AND token = 'bUbHuYZdTEAi93MbAijyq9Sq9hwktLllm6L47XXDyHA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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