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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '74b473d22827b6a53f4b1b36a329dc5a6ecfdce4f37c3c07d69d4ce7809b3eeb' 
  AND token = 'LNF7LYM3A48yclzb6CAb0bUaSarSHaspxLgwAZrdq5s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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