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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fc72f5da968099f0f4cefaf129505813ac34405c46e93625f36c8f6a82ba6118' 
  AND token = 'IhZptPbuHdy0XVKjg2CjCbxcLU+S+Qoq1JjVeAAXSfc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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