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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '99977e472efd790b8ee1fb06e056aa6f99320372345db5f669b3ae6eba27b9bc' 
  AND token = 'zaIpTK2kvFyONN1JIDCtlZZD/ZKRJNqBs5nWJWjpSa0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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