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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8cb1ec70ea5ad1f954d226fd44148a551a08766f6b372adb069caa29ae1e63f7' 
  AND token = 'k9H5ruWgBhQosWbN+Piw1XPyPsRU+DS7jOL2blwhuiI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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