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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2f1ae21d789732972c884ff8cf1b55a4b8ff8195cbc28efc4c5170bbc2687429' 
  AND token = 'SfpHtKy2b/cjFB5mvQEciaotIUOMvGk7z0xBlrsOk5Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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