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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '30ee867f102527678dac76195fc097ef14129c6ca8f4338e1a5ed8c5641e2fac' 
  AND token = 'CNbTzESLRq5mHuQnmsjH8V5tO6zNynormJAef6qMlHY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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