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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'de2d5a86daac7818c5214c9f5d80ade2360f2262ddd393cde5c311f94e651219' 
  AND token = 'Pc5DchYV7D/C+pLAmR2vsHWWjttXydF8V9IXoYXEzGc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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