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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '368c53dcac1ceaee0a3691680551065688078ce1a4b52fce854d37e1c9a76fe5' 
  AND token = 'GxTOzFQ7LcyP0zfgub6tu+hW7lCGfVffJ/4Z5X0q8W0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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