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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8599baccb2c2a389d5b3b6f7f5e86cd0904e00f27a944c72dbe2eb30b3427a79' 
  AND token = 'Al58/6XfTSPL3oUH+HQoBLY6qaCph55xcxQeP65CpX0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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