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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '774fc90d2a68ccf5166cfb63f553b38e9bbc41ca8770b8aa7ea3033630b5948d' 
  AND token = '/0nrgSUAwFhXpDFsm9zaO6bP3kzmWA8KcGties1o6ek=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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