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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2eb6562b8fc90a5535c2f682fc3389dabcf12f156ed4e140a120c05ac94c1d3d' 
  AND token = 'h9Urzlso/wibz6yX40bgw4QmgDL2ZjTF3KO1wz4RYpY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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