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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07baa6f6a9ff406b13b9d7972088c648b0be6b14d2e920618c2d45af6fe14a00' 
  AND token = '93oBYDYhkZTsqkoQG5D7F2vNHJhCJicWM5MmuWGkh4M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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