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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '63f93c5c0f0a8e03e78fc1e9a203ea928735028ac75ba8f4577ea27ee2481c84' 
  AND token = 'zwQTUOaU8Balaj63qomE36SmUmDqUPrkzIr/cHyQpok=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}