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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '485e170c87e4aab51cc5404a4b98da97fcb9065816f9f1821f316a14bb1210ef' 
  AND token = 'pPXXl4XFWlS2epmX1zWvlDdxxx63xQEN8UB/2dtRKW0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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