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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'faa0f73f73214acee3e9a3be15b46163536fb91de1197779ff798384906563a4' 
  AND token = 'D4Dy6KBYeGY4xsVo4GIzDaEOkkJ+3Q6pLVZNSay+U4o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}