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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '85cfae2751de11b526f49fa626af0b9fc6a59da182899ac42d9409f13d5ec677' 
  AND token = 'J32UzS6oo6x6/JknPiSkv3D8CAZoyHWqQ5nzEgKfAHc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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