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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1aa36d668463540645b1c2a82924f5d6311180f11f7180592407abf601c2471e' 
  AND token = '+AgOp/URlcIeFfLxntVDSKGg6Sm4X7eb91YzOJHrbLk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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