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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e063e75e87b91628b8c85c246402f9b42ddf3218b728e3d09f69291c9c7e011' 
  AND token = 'FtrGE1yNSwKMImcgEjDaTUaKKgdyHVWnekog+/W6PMo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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