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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9119ab4981da0e5a7fcee9ff0b465873462b9e55f74dbd0ee584b573e16e81cd' 
  AND token = 'ZPzlMa4IdYJX5/iwyINZzuy6CcXAxHXOQBDmG5kEWqc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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