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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '793a7f41252f1eb62fdfa8d907bc68893f4a4652cfb3745cf6d6c360d0cb2ab4' 
  AND token = 'Y1w6OLwFw0N3EnhbJ/7wZufiyZ4aElajgbmP7SHarOc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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