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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '770db1ad2dbe7e4c676f6aabb366ea65cd7035795ccadfd1917775b134054992' 
  AND token = 'GB3cOSZWiMhdsmdqbx98x9iP3+x1ZxV02NmGst5F9mE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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