Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1d6ff9687bde4543a25bc94f4ce68df7f103cb474bcda60e49382a969e5f8323' 
  AND token = 'gNB8Vy9NeAwiTo7MspHi1AkPV+yXY3ugPbBN5a/stuQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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