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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a3bf5acdf304f9b228bdd877fe7e7c3f9028dc3f1ac04fcf09b3b85d0ee6807f' 
  AND token = 'dghsalLwyLoGQRCwsAJIsruIfS1d8dGirUWqzrxOxmA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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