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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf60c19bb8cd29f12c6ee47634b87e211c53f15d7769b3c49bae714d28948001' 
  AND token = 'qqXfzhxzXWVNB+EeVSGY9flJ0FO20VB2NTcDdx6SSCs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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