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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '010bddacd6e13c894eaed0b020051de058e0c0b4a669ebe0b1b18c55e7d9e4a1' 
  AND token = 'IVOmwAssw7bC+U7kF8V4n/dpv2xlthK+lbPcnkDTWeM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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