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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '04963ea22d64c127a525964777578ca5cddbfb7a6c49aff9b0e193cff3dd2101' 
  AND token = 'GzNVhZHVRyc3ueDomdOKVkSazst0qGDDNVbVD5yFP+I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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