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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '946bc4895bf287a9b23a3f2b5c3433db18c6006b9b033805521d1b35176ede4f' 
  AND token = 'QDM2v0wLBRXcoBVVeDYfuXyciUeP+1B72j2eMH+S07U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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