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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9f3bceab3b601c66c9559569cfb2aa0313533cf13030e42e21d1df5d5fdc738c' 
  AND token = 'Ojm8IjPTQznkoT7PVskVE9nu/aLM/G6TeNKCR13aOCU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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