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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '25b607dd03cd3953f2f9ab7ac9fd4d9f02c686abdf4e2faf29a30e82552a3007' 
  AND token = 'ZFeRES/nCorDbdLI4p46kYeGhFH1HgGzcEsk7xdCzOY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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